If you're unable to take the time off from your job for a trial, you can straight up say that to the judge when they're selecting jury members and they'll thank you for the time you've spent and send you on your way.

I served on a civil jury for a trial over whether a man was financially liable because his son-in-law had climbed up onto his roof without his knowledge to fix something, then fell off while climbing down. Settling this matter took five days, but I live down the street from the courthouse so it was basically paid time off from work.